Wrench.



No. 793,324. PATENTE ID JUNE 27, 1905. A. SHEPARD,

WRENCH.

APPLICATION FILED 11130.30, 1903 Patented June 2'7, 1905.

' ATENT @FFIQE.

AMOS SHEPARD, OF PLAN'lSVlLLE, CONNEC'IIGUT.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 793,324, dated June 27, 1905.

Application filed December 30, 1903. Serial No. 187,176.

To //./Z whom, it 71m (Jo/worn:

Be it known that I, Amos Sn EPARD, a citizen of the United States, residing at llantsville, in the county of Hartford and State of (Jonnecticut, have invented certain new and useful Improvements in \Vrenches, of which the Following is a specification.

The invention relates to an improvement in wrenches; and the main object of my improvcment is elliciency and convenience in operation.

In the accompanying drawings, Figure l is a side elevation of my wrench. Fig. 2 is an edge view of the same, showing the back. Fig. 3 is an enlarged central longitudinal section, partly in elevation, of a portion of my wrench, the sliding jaw being a little nearer the step than in the preceding ligures. Fig. l is a sectional view of the sliding jaw on the line ,w .1 of Fig. I, together with a plan view of the screw. Fig. 5 is a transverse section of the wrench-bar, together with an end view ol the sliding jaw and nut, the screw being removed. Fig. 6 is a transverse section of the handle portion of the wrench on the line 1/ of Fig. l.

A designates the wrench-bar, having at its outer end the ordinary lixed jaw 7. At the inner end of the squared or parallel portion of the bar is the holster 8, the hack of which is substantially llush with the back edge of thehar, as shown in Figs. 1 and 3. Thethickness of the holster is greater than the thickness 0! the said parallel-sided portion of the bar. as shown in the edge view Fig. 2, and the sides of the holster which project beyond the sides of the bar are rounded off and merge into the step f), which is formed integral with the said holster. The usual notch 10 for the head ll of the zuljusting-screw 12 is formed in the edge of the bar in front of the step, the outwardly-roundcd sides of the bar extending longitudinally of the bar a short distance in front of the said notch. Back of the step there is a neck 13 of an oval form in cross-section, and back of that a slightly-enlarged hand 14:, which is the widest longitudinally ot' the bar at the top, as shown in Figs. 1 and 2. This neck and band may he called a part of the bolster. Back of this bolster is the flattened web 15, that extends to the hutt-end of the handle 16 and is of the same general contour as the said handle in side view, the said har, holster, and handleweb being all formed integral that is, in one piece of metal. The handle-web, although of the same general contour as the handle, is cut away or recessed at the step edge, as at 17, Fig. 3, also indicated by broken lines in Fig. 1, whereby the handle may have both of its sides formed in one piece and still lit both sides of the said weh instead of forming the handle of two separate handle-scales. The said recess also materially reduces the projection of that edge of the handle-web relatively to thestep, whereby the drillingot' the step to receive the pin 18 of the screw is facilitated. The handle 16 is slotted longitudinally to receive the hamlle-web, excepting at the solid connecting portion i9, Figs. 3 and 6, which solid portion is litted to the notch of the handle-web. lins or rivets 20 may be employed to secure the handle to the handleweb.

The bar A is provided with a shallow groove 21, Figs. 3 and 5, which extends from the notch 10 toward the lixed jaw a distance equal to or a little greater than the length of the adjListing-screw 12, the said groove in crosssection being formed on the are of a circle the radius of which substantially conforms to the semidiameter of the screw, measuring from the top of its thread. The sliding jaw 22 is in part of the ordinary form; but the nut 23, forming part of the said jaw, is slotted on the side toward the bar, as test shown in Fig. T, the center of its here being nearer the edge of the bar relatively to the diameter of the screw than ordinarily, whereby the bore runs out on that side, and the screw may lie closely to the edge of the bar for its entire length without any metal being interposed between the said edge of the bar and tops of the threads of the screw at the longitudinal center of the said screw on that side which confronts the said edge. This would he the case it' the bar was not grooved; but I prefer to groove the bar as shown and to arrange the screw so as to slightly project into the said groove and obtain a wider bearing for the screw against the edge of the bar than would be had if the bar were not grooved. By thus arranging the screw so that the whole length of its body may have a bearing contact with the confronting edge of the bar it is necessary to make the notch in the bar deeper than it would be to receive the same screw-head if the body of the screw were farther from the edge of the bar. This deeper notch weakens the bar to a greater extent than a notch of less depth, and my improvement as to reinforcing the bar, although of general application, is far more important in a wrench having the body of the screw arranged to be supported by the bar than it is in the most common form of wrench, where the body of the screw is unsupported by the wrench-bar. The said sliding jaw has two straps 24, extending beyond the back edge of the bar, and also straps 25, extending in like manner from the nut 23, the said straps being connected on each side of the wrench by the longitudinal bars 26. Both pairs of the said straps are provided with shoulders 27 for extending a short distance over the back edge of the bar, as shown in Fig. 5. This shouldered feature is not new in itself. The longitudinal connecting-bars on each side of the shouldered ends of these straps are made in order that the said straps may be spread apart slightly for slipping the sliding jaw over the bar and then bent together to partially embrace the back edge of the bar. Separate filling-blocks 28 and 29 are inserted between the pairs of straps 24c and 25, respectively, at the back of the bar, where they are secured by pins 30.

By the peculiar construction of the bolster the wrench-bar is reinforced adjacent to the notch for the screw-head and step, so that the step will not be displaced under the endwise pressure of the screw, and at the same time there is no shoulder on the back adjacent to the said bolster, whereby when the operators fingers extend over the back, as they naturally do in handling, the wrench is conveniently and pleasantly handled. By recessing thehandle-web at the step edge a single piece of wood or other desired material may be employed for covering the two sides of the handle, whereby the two sides of the handle always match and the handle presents a smooth and agreeable surface. The said recess also facilitates drilling the step to receive the pin 18 for the screw. By having the bore of the nut run out on that side which faces the bar and having one side of the screw project through the open side of the nut adjacent to the edge of the bar any strain on the screw tending to bend the same is resisted by the said bar, whereby the screw is not liable to become bent. By means of the connectingbars 26 between the shouldered ends of the straps 24; and 25 on each side the holes for the pins 30 may be drilled and the said straps afterward bent for assembling the parts without disturbing the relations of the said holes to each other.

I claimas my invention- 1. In a screw-wrench, a slide having a movable jaw, an ad j Listing-screw for operating the said movable jaw, the wrench-bar having an integral step, a screw-head notch in one edge of the said bar that extends to the face side of the said step, a fixed jaw on the outer end of the said bar and a parallel-sided portion for the said slide to move over between the said notch and fixed jaw, the sides of the said bar between the said notch and opposite edge of the said bar being rounded outwardly from the said notch and from the edge of the bar that lies opposite the said notch, the said outwardly-rounded sides projecting beyond the corresponding sides of the said parallel-sided portion, whereby a cross-sectional area of the said bar through any portion of the said notch that lies in front of the said integral step is fully equal to a cross-sectional area of the said bar through the said parallel-sided portion.

2. In a wrench, having fixed and movable jaws with an adjusting-screw for operating the movable one of the said jaws, the wrench-bar having a-step for said adjusting-screw, and a handle-web extending from the said step for receiving a handle, the said handle-web being partially cut. away or recessed at the widest portion of-the complete handle and at the step edge of the said handle-web.

3. In a wrench, having a wrench-bar and handle-web, the handle-web of the general contour of the complete handle with a portion at one edge cut away or recessed and a handle in one piece having a slot to receive the said handle-web and an unslotted solid portion by which the two sides of the handle are connected, the said solid portion being fitted to the said cut-away or recessed part of the said handle-web.

4. In a wrench, having wrench-bar with fixed and movable jaws, the movable jaw and nut having shouldered straps 24 and 25, and connecting-bars between the said straps on each side at the shouldered ends thereof.

5. In a screw-wrench, the combination of a slide having a movable jaw, a headed adjusting-screw for operating the said slide, and a solid seamless wrench-bar having an integral step, a screw-head notch formed at one edge of the said bar on the face side of the said step, a fixed jaw at one end of the said bar, a portion for the movable jaw to move over having parallel sides and edges, and outwardly rounded and projecting sides at the said notch that terminate in beveled shoulders on the two broad sides of the bar, and terminate at the two edges of the bar, which edges extend continuously without any shoulder along the length of the bar from the said fixed jaw to the said notch.

6. In a sliding-jaw screw-wrench, the 001m bination of a headed adjusting-screw with the l ing reinforced at the said notch by integral movable wrench-jaw having a nut for the said l projecting sides between the back edge of the screw, and the wrench-bar having a fixed jaw l bar and the said notch, and also between the at one end, a notch in one edge to receive the i opposite edges of the said bar forward of the head of the said screw, and a step with its face said notch.

rltlb in the said note 1 tor the head of the sald AMOS SHEPARD screw to abut against the said screw being arranged relatively to the said bar with the \Vitnesses:

body of the screw supported by the confront- .llmns Snnmnn,

ing edge of the said bar, the said bar also bellnmmn'r S. Worms. 

